Aerosmith: Steven Tyler Back on Drugs?

There's certainly been a lot of drama within the Aerosmith camp lately, and guitarist Brad Whitford has a theory as to why: singer Steven Tyler is back on drugs.

"This guy has a tremendous history of drug abuse, and you have to be suspicious that this is something that is probably going on with him," Whitford told Rock Radio. "I think that that's got to be a part of this irrational behavior." (Tyler has denied any recent drug use.)

Irrational, indeed. Since Tyler's fall from the stage in South Dakota in August forced the band to cancel their U.S. tour, the frontman has been estranged from the band, and even said he plans to leave the Boston fivesome to focus on "something Steven Tyler: working on the brand of myself -- Brand Tyler." Guitarist Joe Perry soon Tweeted that "Aerosmith is positively looking for a new singer to work with," only to be surprised just days later when Tyler arrived unannounced at Perry's solo gig in New York to perform "Walk This Way," and tell the crowd that "I'm not leaving Aerosmith."

While it seemed all the hubbub was a big misunderstanding, that certainly wasn't the end of Aerosmith's dramarama.

After the gig, Perry claimed the band's issues were far from over, as Tyler still planned to take two years off to pursue solo endeavors. Whitford, mirroring Perry, said the band are still considering moving forward with a new singer.

"We all know that there's really no way to replace Steven, but we want to continue touring together," Whitford said. "We even have a 40-year anniversary coming up and it's a milestone. We want to be able to celebrate it together and there's millions of fans out there that are dedicated to us."

Elaborating on Tyler's potential slip back into drug abuse, Whitford added: "Historically or statistically, the majority of people in that situation don't make it. I have a feeling we might be looking at, you know, someone who's just really struggling very badly with this."